Low-water alarm



(No Model.)

W. H. WESTERMAN.

LOW WATER ALARM.

No. 468,390. Patented Feb. 9, 1892..

UNITED STATES PATENT OFFICE.

7 WILLIAM H. \VESTERMAN, OF BARNHARTS MILLS, PENNSYLVANIA.

LOW-WATER ALARM.

SPECIFICATION forming part of Letters Patent No. 468,390, dated February 9, 1892.

Application filed May 23, 1891. Serial No. 393,870. (No model.)

To ceZZ whom it may concern:

Be it known that 1, WILLIAM II. \VESTER- MAN, a citizen of the United States, residingat Barnharts Mills, in the county of Butler and State of Pennsylvania, have invented certain new and useful Improvements in Low-W'ater Alarms, of which the followingis a specification, reference being had therein to the accompanying drawings.

This invention relates to certain new and useful improvements in low-water alarms for boilers; and it has for its objects, among others, to provide a simple, cheap, and effective device for this purpose, adjustable so as to operate with more or less movement of the expansion-pipe, the expansion of which is designed to operate a trigger and sound an alarm. Y I provide a sleeve to surround the expansion-pipe, and to this sleeve I pivot a twoarmed lever, one arm of which is adjustably connected with a rod, one end of which is connected with the expansion-pipe, so as to be effected by the expansion thereof, a spring being arranged to act upon the arm of the lever on the rod, and means being provided for regulating the tension of the spring. A lever pivoted on the sleeve at right angles to the twoarmed lever is provided with a weight and connected with the alarm or cock.

Other objects and advantages of the invention will hereinafter appear, and the novel features thereof will be specifically defined by the appended claims.

The invention is clearly illustrated in the accompanying drawings, which, with the letters of reference marked thereon, form a part of this specification, and in which- Figure 1 is a side elevation illustrating my invention. Fig. 2 is a view at right angles to Fig. 1.

Like letters of reference indicate like parts in both views.

Referring now to the details of the drawin gs by letter, A designates an expansion-pipe provided with an elbow or T a. The alarm is designed to be placed on the second watergage of a boiler, and when the water is above that point the expansion-pipe stands full of water and when the water leaves that point hot steam takes its place.

B is a sleeve designed to be sleeved on the expansion-pipe, and for the purpose of ready attachment of this sleeve and to permit its being applied without removal of the pipe I form the said sleeve of, say, malleable iron, with lugs or ears 1), so that it may be placed around the pipe and drawn together and held in place by screws or other means 0, passed through screw-threaded openings in said ears. This sleeve is provided with a lateral lug (Z, to which is pivoted at the elbow an elbow or two-armed lever C, the longer arm of which is formed into a hook e, as seen in Fig. 1, and the shorter arm extends horizontally or substantially so, and is formed at its free end with a ring or sleeve f, which is loosely sleeved on the vertical rod D, which at its upper end is connected with the T of the feed-water pipe, and its lower end screw-threaded, and provided with a thumb-nut E, upon the upper face of which the ring of the short arm of the lever rests, as seen in Fig. 1..

F is a horizontal lever pivoted at g on a lug h on the sleeve B, as seen in Fig. 1, one end of this lever being arranged to engage the hook of the long arm of the lever O, and provided upon the other side of its pivot with an adjustable weight G, as seen in Fig. 1, the end of the long arm of this lever being designed to be connected with a suitable alarm (not shown) by a cord or chain H, as indicated in Fig. 1.

The operation will be apparent from the above description when taken in connection with the annexed drawings. The parts are adjusted so that slight movement of the rod D will disengage the two levers when the weight will pull down the long arm of the lever F and sound the alarm. As the water in the boiler and expansion-pipe gets low the nopart of this pipe becomes hot and expands, and thus pulls upward on the rod D sufliciently to throw the long arm of the lever C outward and thus disengage the lever F. A spring H is arranged around the rod D between the ring of the short arm of the lever C, and a collar j on the rod, as seen in Figs. 1 and 2, and the tension of this spring is regulated by the thumb-screw screwing up on the screw-throwing out the hook end of the long arm of the lever C, and setting the device to operate with less movement of the rod D, and

unscrewing the thumb-screw and moving the said hooked end inward, so that greater move ment of the rod D will be required to operate the device. It will be seen that but very little expansion of the pipe is required to trip the long lever. that the long lever might be connected to the stem or handle of a stop-cock to shut off the supply of gas or open a valve that would extinguish the fire, the operation of the parts embodying my invention being the same in all instances.

" What I claim as new is 1. The combination, with the expansionpipe and the rod connected therewith, of the two-armed lever, the weighted lever con nected with the alarm and arranged to engage one arm of the two-armed lever, the spring It will also be readily understood on the said rod, and the thumb-screw for ad justing the tension of the spring, as set forth. 2. The combination, with the eXpansionpipe and the rod connected therewith, of the sleeve on the pipe, provided with lugs, as shown, the two-armed lever and the weighted lever pivoted to the said lugs, the former being provided with hook and ring, the latter sleeved on the rod, the thumb-screw on the rod beneath the ring, and the spring around the rod between the ring and a collar on the rod, substantially as shown and described.

In testimony whereof I affix my signature in presence of two witnesses.

WILLIAM H. WESTERMAN. \Vitnesses:

JAMES KIFER, JOHN F. HUSELTON. 

